"It's hard as hell. Now, I'm not gonna take the full blame. It's the developer's fault." As the developer, I take full responsibility for the difficulty. :)
I'm glad you enjoyed the demo. Most of the bugs you encountered, including the lack of a CONTINUE screen after Game Over, were fixed in v.004, as well as some adjustments to the difficulty including larger hitboxes for some weapons, higher chances of chests, and lowered damage from some hazards. You can download this version at the link you put in the description. Very entertaining review, and I appreciate that you familiarized yourself with the game a bit before recording your impressions. I've taken some notes from your and other's feedback, and I'll be adding some thing to the game in the future such as crouching attacks based on the responses I've gotten. Thanks again for playing my game!